Helical flute end mill



FIG. 1 is a first side view of a helical flute end mill showing my newdesign.

FIG. 2 is a front perspective view of a helical flute end mill showingmy new design.

FIG. 3 is a top view of a helical flute end mill showing my new design;and,

FIG. 4 is a bottom view of a helical flute end mill showing my newdesign.

The black portions represent a helical stripe of a first color, whichextends along a portion of the rake surface of each flute of the helicalflute end mill. The black portions are bounded on one side by acorresponding helical cutting edge and its adjacent land surface. Theblack portions are bounded on the other side by a second color seen onthe surface of each flute, the second color being represented by thestippled area. A broken line associated with the stippled area helpsidentify the surface of a corresponding flute and represents that thestippled area extends across the remainder of that flute. The firstcolor represented by the black portions is different from the secondcolor represented by the stippled portions. The first color and thesecond color may each be any color, including black, so long as theydiffer from one another and are suitable for distinguishing the twoportions.

The shank of the helical flute end mill, contours associated with eachflute, and the tip of the helical flute end mill are shown in dashedlines, depict unclaimed environmental subject matter and form no part ofthe claimed design. The dashed dot dashed lines depict the boundaries ofthe claimed design and form no part thereof.

The ornamental design for a helical flute end mill, as shown anddescribed.